Don’t take his remarks too seriously．He was so sad that I don’t think he really ________ what he was saying．

A．knew

B．knows

C．was knowing

D．had known

To his disappointment, the opinion he had struck on ________ wrong．

A．turned out

B．turning out

C．was turned out

D．to be turned out

Early ________ of a disease can prevent death and illness

A．edition

B．immigration

C．identification

D．starvation

Patiently the crazy fans of the Super Girl ________ for two hours, and they would wait till the group of stars arrived．

A．were waiting

B．would wait

C．had waited

D．had been waiting

The machines we use today are much better than ________-we used ten years ago．

A．those

B．ones

C．which

D．that

To test which foods are better for a long journey, the astronauts in Shenzhou VI had as many as 50 dishes ________．

A．to choose

B．to choose from

C．to be chosen

D．to be chosen from

Try to guess which ________ the horse ________ to me?

A．is, belongs

B．does, belong

C．is, belonging

D．is, belonged

Chicago lies ________ the two rail roads are connected

A．where

B．wherever

C．in the place

D．in which

The oil must have been used up, ________ the light went out．

A．for

B．because

C．since

D．as

It is only when you lose something ________ how much you value it．

A．then you will realize

B．do you realize

C．that you will realize

D．which you will realize